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05-20-2012, 02:38 PM | #1 |
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Join Date: May 2011
Location: stafford,CT
Posts: 30
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Straight 6 250 sputtering after key is off
I have a 84 c10 with a 250 inline 6. Single barel carb. After truck is warm I shut the key off and the truck continues to sputter/pop for another 5-10 secconds. Anyone know what might be going on?? Thanks,Be njn
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05-20-2012, 04:57 PM | #2 |
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,192
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Re: Straight 6 250 sputtering after key is off
Its usually caused by the idle speed to fast. Also can be from a vacuum leak. Some of those used a selinoid on the throttle to drop it back when you shut it down.
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05-20-2012, 10:40 PM | #3 |
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Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Straight 6 250 sputtering after key is off
After you check what Wrenchbender said also check the timing and choke adjustment.
If all checks ok, get a couple of cans of good gas treatment to put in the gas tank. You may have a build up of carbon in the heads and it may take 2-3 tanks full with additive added to clean out. Took me about three tries but haven't had a recurrence since. |
05-20-2012, 11:47 PM | #4 |
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Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: Straight 6 250 sputtering after key is off
Has the truck always done this?
Or is this a new problem in recent weeks? Is it a new problem after installing an elecric fan, radio....? |
05-21-2012, 04:00 PM | #5 |
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Join Date: May 2011
Location: stafford,CT
Posts: 30
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Re: Straight 6 250 sputtering after key is off
Recently. The head is rebuilt and it may be a timing issue as a result of truck being slammed off a curb due to a near missed car accident. Maybe distributor spun alittle.
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